sum-of-frogs-with condition [list of commands]
Reports the total value of [list of commands] when run over the turtles of
breed frogs that satisfy condition . If there are no
frogs in which condition is true, 0 is returned. Note:
This command can also be executed by patches, for example within an ask-patches
statement.
Examples:
sum-of-frogs-with [color = green] [age] returns the sum of all of the ages of the green frogs .
Related commands:
sum-of-frogs
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